XYZ Racing Top Sport Coilovers — Porsche 991 GT3 RS (without hydraulic lift system) (Cancellation Kit for Electronic Damping) 2016-2026

The 991 GT3 RS arrived from Stuttgart as one of the sharpest naturally aspirated tools Porsche has offered for road registration – flat-six redlining deep into the eight thousands, rear mass concentrated over the trailing axle, and a PASM electronic damping system sophisticated enough that most aftermarket coilover fitments require a dedicated cancellation solution simply to function without fault codes. That last point is the starting specification here, not a complication.

XYZ Racing’s Top Sport coilover for the Porsche 991 GT3 RS (2016-2026) is built around exactly that. Adjustable spring and damper hardware pairs with a dedicated cancellation kit that presents the PASM ECU with the correct electrical signal, eliminating fault codes while returning full mechanical control of the suspension to the driver. The Top Sport calibration occupies the space between committed circuit sessions and the long fast-road runs a car like this regularly handles.

What this coilover does for your 2016-2026 Porsche 991 GT3 RS

Rear-engined GT3 RS dynamics mean any imbalance in suspension tune lands harder than it would on a front-heavy car – too firm at the front relative to the rear and the 991’s weight distribution compounds understeer under compression; too soft and the nose floats over fast crests. The Top Sport runs 30-50% firmer in damping relative to a standard street setup and approximately 2kg/mm stiffer in spring rate, tightening transient response without pushing into the threshold where a car becomes fatiguing to drive between circuits. Removing the factory PASM electronic dampers replaces adaptive automatic control with a manually adjustable baseline the driver can set once and rely on – predictable, repeatable, and unaffected by the system’s own calibration decisions. The firmer spring rate also loads the rear contact patch more consistently through the GT3 RS’s wide rear track geometry, improving traction on corner exit and stability where the rear mass is most influential.

About the Top Sport coilover

Sitting at the upper end of XYZ Racing’s dual-purpose range, the Top Sport is stiffer than the company’s general road specification and more tractable on normal road surfaces than a dedicated circuit kit. Damping resistance runs 30 to 50 percent above a standard street baseline; spring rates sit approximately 2kg/mm firmer. Together, those figures increase contact-patch load through compressions and reduce body movement across the surface irregularities a GT3 RS encounters on any road drive, not just a circuit. XYZ Racing developed the Top Sport calibration through its own motorsport programme, and the setup reflects that work in its emphasis on adjustable, composed performance over both bumps and kerbs. Central to this specific fitment is the PASM cancellation kit: it delivers the correct electrical resistance to the 991’s damper control circuit, preventing the ECU from logging fault conditions once the factory electronic units are removed. The result is a 991 GT3 RS running aftermarket mechanical suspension with no associated chassis warning lights and no compromised electronics elsewhere in the car.

Fitment for the Porsche 991 GT3 RS (2016-2026)

Catalogued to chassis code PO13-C, this kit covers the Porsche 991 GT3 RS across the 2016-2026 fitment window. It is specified for cars running without the factory hydraulic front-axle lift system; if the lift option is present, a separate kit applies. The PASM electronic damping cancellation kit is included in the box and is built to the electrical specification of the 991 platform’s damper control circuit.

What buyers also search for

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• XYZ Racing Top Sport coilover for Porsche 991 GT3 RS without hydraulic lift
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• Adjustable coilover for Porsche 991 GT3 RS 2016-2026 with PASM delete

A GT3 RS with mechanically controlled, manually adjustable suspension is a measurably different machine from the factory configuration – select your spec and build yours below.